Were you considering doing any internal modifications? 50/60Hz is software selectable. So to start up in 60Hz mode you'd need to alter the main ROM. But you probably don't want that because if your screen can't do 50Hz then you're just going to have issues with most software. My further reading of t...

Wandering through again. Still no direct progress on a PC port. But, several small bug fixes: previously it was possible for disks to corrupt themselves in memory in physically-impossible ways (including data mirroring), though you'd probably have needed to reformat a disk image in the emulated mach...

Hi again; quick drop-in to say that the video issues that presented themselves on a Mac Pro are now resolved. I'd made an error in mapping between buffers such that I was unintentionally relying very heavily on floating point rounding going one way rather than another. So it could easily have surfac...

Do you need a chip? I have a lot of 8877 chips used in the Cumana. They aren't directly compatible and need some different capacitors or something but if you're stuck it might be possible to substitute. Oh, no, but thanks for the offer! It was merely academic interest pursuant of emulation. Sadly I...

Not seeing any issues with graphical glitches on my MBPro ... I feel like probably there's a piece of state I'm failing properly to initialise, or something like that. Based on trying the various emulated machines, it's seemingly processing data correctly and outputting it to the right place but pu...

I wrote my first emulator on a laptop with something like a Pentium 133 as the main CPU so please don't complain with your highly powered computer... ;-) Good work with the latest release :) I suspect I may have had a Pentium 200 in mine but my point was more: I can't just throw on a Linux virtual ...

I wrote my first emulator on a laptop with something like a Pentium 133 as the main CPU so please don't complain with your highly powered computer... ;-) Good work with the latest release :) I suspect I may have had a Pentium 200 in mine but my point was more: I can't just throw on a Linux virtual ...

Do you have any plan for releasing Windows and Linux versions of the emulator? I definitely want to. I just don't currently have great access to either type of system; I'm developing on a five-year old MacBook Air which means limited everything, including hard disk space. But I've attempted to keep...

For the record, an example of my emulator's current attempt at AY playback is here and attached in lossless form — it's the opening of Barbitoric (with disk access gaps). The windowing filtering gives some very non-square wave forms such as the below, based on some real maths, so hopefully I'm alrea...

Obviously an emulator will miss the analog part (filter & so on) that are not impossible to emulate but really time consuming to get something accurate.. Mine has a filter; it creates a wave at the chip's clock rate then performs a windowing filter to reduce it to your computer's sampling rate. But...

Obviously an emulator will miss the analog part (filter & so on) that are not impossible to emulate but really time consuming to get something accurate.. Mine has a filter; it creates a wave at the chip's clock rate then performs a windowing filter to reduce it to your computer's sampling rate. But...

Perhaps a sound signature of the inventor of the AY? Some instructions not listed in the 6502 runs correctly, the engineers hide us something... In fact, it seems related to the way random number are generated. The noise generator is mainly a random function, and since on computer random is never r...

I'm well behind the time but, if it's of any help at all, the only difference you'd need to make in video output to produce interlaced graphics rather than progressive is to ensure that every other vertical sync ends halfway through a horizontal line. So it'd either need a ULA modification or some w...

Could you check these ones: - http://www.pouet.net/prod.php?which=64343 - http://www.pouet.net/prod.php?which=65688 they will probably fail to, if they do, then it means I probably forgot to call the compute crc somewhere in the FloppyBuilder :) I got: OricTech.dsk: Completed; 84 tracks found, 2856...

Further on this, I'm finding that quite a few of the PC-produced pieces of work that are slightly older have incorrect CRCs but none of the things imported from a real Oric or that are more recent (including 1337 and Space: 1999). I've also filed a bug against Oricutron alleging that it doesn't chec...